U₂₃₃ and Pu₂₃₉
U₂₃₅ and Th₂₃₂
U₂₃₅ and Pu₂₃₈
U₂₃₃ and Pu₂₃₈
A. U₂₃₃ and Pu₂₃₉
Used fuel should be reprocessed
Moderator should be used
Coolant should be employed
Control rods should be used
Same
More
Less
There is no such criterion
Light weight atoms
Heavy weight atoms
Critical atoms
Zero weight atoms
Electrons
Protons
Neutrons
Atom
Infinite
Zero
Exactly balanced by the loss of neutrons through leakage
Initiated
Is lighter
Is inert
Has high specific heat
Is a good conductor
Slow down the speed of fast moving neutrons
Control the reaction
Reduce the temperature
Extracts heat from nuclear reaction
1 MeV
2.4 MeV
4.3 MeV
7.8 MeV
As basic raw material
By neutron irradiation of Uz
By neutron irradiation of thorium
Artificially
It is generating power to rated capacity
It is capable of generating much more than rated capacity
There is danger of nuclear spread
Chain reaction that causes automatic splitting of the fuel nuclei has been established
Coolant itself
Ferrite rod
Graphite rod
Liquid sodium metal
The most fissionable material
The basic fuel for nuclear paints
Basic raw material for nuclear plants
The material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material
By increasing the contents of U₂₃₅
By slowing down fast neutrons so that U₂₃₅ fission continues by slow neutron
Both (A) and (B)
None of these
1 tonne of high grade coal
4.5 tonnes of high grade coal
10 tonnes of high grade coal
100 tonnes of high grade coal
Natural uranium
Molten lead
Any form of uranium
Thorium
More
Less
Same
Zero
1-99 %
1-25 %
1-50 %
1-75 %
Centrifugal
Axial
Reciprocation
Electromagnetic
Electron volt
Electron ampere
Curie
MV
Fast moving
Slow moving
Critical neutrons
Neutrons at rest
1 neutron
3 neutrons
1, 2 neutrons
2 neutrons
Mass number
Atomic number
Chemical properties
Position in periodic table
Higher cost of nuclear fuel
High initial cost
High heat rejection in condenser
Lower temperature and pressure conditions
Increases
Decreases
Have no effect on
None of these
Boiler
Direct cycle of coolant system
Double circuit system of coolant cycle
Multi passes system
90% U₂₃₅
U₂₃₈
U₂₃₅
Pu₂₃₉
Operate at extremely high power densities.
Are liquid metal cooled
Produce more fuel than they consume
Use water as coolant
Plutonium
Uranium
Deuterium
Thorium
Does not absorb neutrons
Absorbs neutrons
Accelerates neutrons
Eats up neutrons
The original elements change into completely different elements
The electrons of the element change
The molecules rearrange themselves to form other molecules
None of the above